Adjustable shore



W. L. CHURCH.

ADJUSTABLE SHORE.

APPLICATION FILED Aue.5, I9I9.

Patented Aug. 22, 1922.

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. L. CHURCH.

ADJUSTABLE SHORE. APPLICATION Flu-:n AuG.5. 1919.

Patented Aug; 22, 1922.

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` a speciiication.

WILLIAM Lun enuncia, or NEWTON cnNTER, MASSACHUSETTS, ASSIGNOR To Uni-FORM contri/mv, n oonroRATroN or MASSACHUSETTS.

ADJUSTABLE SHORE.

Specification of `Letters Patent.

Patented Aug. sa, ieee.'

Application le. August 5, 1919. Serial No. 315,446.

a citizen of the United States, residing atv Newton Center, -in thecounty of Suffolk and State of*l Massachusetts, have invented certainnew and useful Improvements. in Adjustable Shores, ot which thefollowing is This invention relates to shores or struts for supportingforms :tor concrete lworlrand the like, and it has for one of itsprimary objects the provision of an improvedshore which will form:lpermanent equipment, ca-

pable of repeated use and ready shipment,l in contradistinction to thetemporary shor# ing which is ordinarily constructed on the ground anddiscarded upon the completion of the operation.-

head for-shores. i f

My invention also contemplates thev provision of improved means forrendering the shore adjustable, the arrangement being such, however,that the parts of the shore are positively held in positions ofadjustment and settling of the shoreis prevented.-

Still another object of my invention resides in the provision of anadjustable shore in which very close adjustment is obtained, and inwhich, in addition, wear on the parts is reduced to a negligible factor.

I accomplishl the foregoing togetherrwith such other object-sas may`hereinafter appear, byv means of a construction, the-pra ferredembodiment of which I have illustrated in the accompanying drawingswherey Figure 1 is a fragmentary side elevationside elevation 4oi: theupper portion ofthe center support of the shores; Figures l and 5 areside elevations of a vmodified-form of head cross piece; F igures', 7and 8 are side elevations of the shore showing the means wherebythe samemay be adjusted in height and illustrating the manner iii-whichadjustment is effected; Figure 9 is a lperspective of a detail of myinvention whereby it is possible to obtain very close adjustment of theshore to the work; and Figure 10 is a shown -in Figure 9.

j In Figures and 5y, I have shown modi-v Referring now to Figures 1 and6,it will be seen that theshore comprises the center support the sidemembers or'pieces 8; and the collapsible headindicated as al wholebyreference letter A.

i The head comprises the cross piece 9 and the braces 10.v The head isdetachably supported on the strut as follows: i

On each of two opposite `sides the center support 7 is provided with acheek 11, pref! era-bly 4in the form of a metal'plate securedv to thetop of the center support `by any preerred means, such for example asthe screws M12, the upper: edges of theV cheeks projectingslightly'abovethe top of the'support. The cross piece 9 is providedwith' a pair 'otjop-` positely disposed downwardly projecting irons 1 3,secured to they lower face-0f' thev cross piece andspacedjapart 'so astottheend of the center support. `The cross kpiece `maticallycenteredfthereonl and held "fas y members such, for 'eXample,-as theangle Another object of the invention resides'in" the provision of .animproved collapsible sor vagainst rotation, as well as movement rela- 1tive to the center post or support inv any lateral direction. krIhebraces l0 secure .the

cross piece to thecenter support andA also vbrace the cross piece; EachbraceI is bolted to the cross piece by ymeans of'a bolt 141er swingingmovement relative thereto.` f' The braces are secured to opposite facesof the 'cross piece "and at `theflower ends they are `apertured toreceive thev bolt 17",l which is'- adapted .to be` alsoijpassed throughlthe bolt hole 18 of the center support.- It will bel seen that 'by thisarrangement the head is securely but Idetachably fastened to andsupportedfrcm the center support.'`

In order that the head maybe ycollapsed into compact form, suitable forshipment,l I provide .a'hole 19in the cross piece 9 midway between theholes for the bolts 14;. and in `each brace 10,2'I drill'a 'hole 2O atsuch apoint that when the braces areswung to the position shown'inFigure-2, the bolt holes 19 and 2O willicoincide so .that'the bolt 17,previously withdrawnin` order to center support, may be utilized to'`secure the parts in the positionv shown in Said-tigure. Noextra partskare thuslrequired.

i oc

, l permitthe removal of' the-hea'd-.fromthevl CII ications of the meansfor centering the cross l'iead on the center support. ln theconstruction of Figure t, l provide a pin 2l adapted to lit into a holedrilled in the top of the center support; and in Figure 5, l cut ashallow groove or recess 22 in the lower face of the cross piece of awidth suiiicient to fit the center support.

Referring now to the means for adjusting the shore as to length to suitthe particular work in hand, l provide the side pieces 8 with aplurality of holes o, t, c, etc., preferably spaced equidistantly, andl4 provide the center support with a plurality of holes a, c', etc.,also preferably spaced equidistantly, the distances between the holes a,t, c, etc. being slightly greater than the distances between the holesa', Z5', c', etc. For purposes vofillustration this difference betweensuch distances may be taken as one inch, the distance 'rt-b being 6 andb 5".

Referring now to Figure 6, when the center support 7 is in lowermostposition, the holesa and a will be in alinement, which will bring theholes j and `g and the holes ,7c and m into register. Bolts 23 may bepassed lthrough any desired number of the alined or registering`openings. YWith the parts in the position `shown in Figure 6 there willbe no extension of the shore and assuming that an extension of one inchis desired, the center support. is raised one inch which will bringholes t and Vg and 7L and Z and n into alinement for the receptionA ofbolts 23. For eve-ry additional inch in length desired, the rcenter postis raised, bringing into registry other sets of bolt openings.

ln Figure Sil have illustrated a 23 inchv extension which bringsthefopenings z' and f into registry for the reception of a bolt. It willbe notedA that as the shore is eX- tended the position of the boltsrises until with a 23 inch extension, as shown in Figure 8, the upperbolt is in the top holes in' the side pieces and the lower bolt comesabove the center of the side pieces. lf now an additional extension ofone inch be made the openings e and a will vcoincide thus bringing thebolts inte lowermost position, i. e. with reference to the centersupport, and permitting of a still greater extension of the strut. Forall practical purposes an extension of 29 inches' will suiice and forthis extension 7 ft. side pieces will be required.

lt will be seen that the adjustment depends upon the differentialrelation of the Vbolt openings, which may be said to be graduated as tospacing somewhat `in the nature of aY Vernier scale.

`lt-will be `noted from the foregoing that a wide range of adjustment ismade possible by this arrangement and it is further to be noted that theshore is positively held in positions of adjustment so that settlingcannottake place and there is little or no wear on the parts. lt will ofcourse be understood that my invention is not limited to the precisegraduation specified, but l have found this to be the most satisfactoryunder practical service conditions.

lf closer adjustment is required, particularly where it is desired toavoid the use H of wedges, l provide the supplemental devices shown inFigures 9 Vand l0. ln adapting the shore for the application of such adevice as is shown in Figure 9, l cut off a piece about 6 inches inlength from the 'lower end ofthe center support 7' and drill holes inthe side pieces for the reception of a bolt2d on which the substantiallysquare bloclr may be revolubly supported between the side pieces. Thebolt receiving hole in the bloclr is located to one side of the truecenter thereof, as for example two inches from the bottom face AB of theblock, two and one quarter inches from the face CB, two and one halfinches from the face Cl), and two and three quarter inches from the faceDA. The width of the block is such that the block -iits neatly betweenthe 'side pieces so that it may be rotated when the bolt is eased offand tightly clamped between the side pieces when the bolt is tightened.y

lVlien the face AB is down7 it will be flush with the ends of the sidepieces,y and there will be no extension 'of the shore. lf the blocl: benew turned to the right one quarter, so that the face BC is at thebottom, there will be an extension of the shore one quarter inch, forthe reason that the face BC will project one quarter inch beyond theends of side pieces. lf the block be turned one half, the face CD willbe at thebottom and the extension `of the shore will be one half inch,and if the face DA is at the bot- Y tom, the extension will be threequarters of an inch. Thus, for example, after the main adjustment hasbeen effected as hereinbefore pointed out, a finer adjustment in quarterinches may be had. n

lf a still closer adjustment is required this can be accomplished 'bymeans of the modification of Figure l0, in which, instead of providing asubstantially square vblock as shown in Figure), l provide an irregularor distorted octagonal block with 'the radii to the different facesrvarying by increments yone one-eighth of an inch, say for example fromtwo inches to two and seven-eighths inches. Such a block becomespineffect a` virtual cam.

l claim: l

l. A. shore comprising in combination a supporting member and acollapsible head therefor, comprising a cross piece anda pair of bracespivoted to the cross piece for f tive to the'cross piece.

3. A shore comprising in combination a supporting member and acollapsible head, said head comprising a cross piece and braces pivotedat one end to said cross piece, a bolt adapted to detachably secure theopposite ends of the braces to the supporting member, and bolt openingsin the braces and cross piece adapted to register when the braces arecollapsed whereby said bolts may be utilized in holding the memberscomprising the head in position of collapse.

4. shore of the character described comprising in combination asupporting member, a detachable head,

tively positioning said members, said means comprising a pair of spacedangles secured to the lower face of the head and a pair of platessecured to opposite faces of the supporting member and projectingthereabove, and means detachably securing the head to the support.

5. A shore of the character described co-mprising in combination asupporting member, a collapsible head, inter-engaging means on saidsupport and head for relatively positioning said members, and comprisinga pair of spaced angles secured to the lower face of head and a pair ofplates' secured to opposite faces of the supporting member andprojecting thereabove, said colj lapsible head including a pair ofbraces inter-engaging means on said support and head for rela-lpivotedjthereto, and means for detachably securing the braces to thesupporting mem-` ber.

described comprising in combination one lmember provided with aplurality of holes equally spaced and a second member also provided witha plurality of holesvequally spaced but the distance between holes beingof a different dimension thanon the firstl member, said membersbeingrelatively movable and the relation betweenthe two sets of holesbeing in eEect that of the markings 6. An adjustable shore of thecharacter on a vernier scale, and said membersbeing f of suilicientlength to bring at least two pairs of holes in alignment in allpositions of normal working adjustment between the members, `and asupporting-member adapted to be passed through the aligned holes.

7. `n adjustable shore of the characterv described comprising incombination a pair of cooperating relatively movable members each ofwhich is provided with a set-of means for support, the relation betweenwhich sets is that of the `markings on a vernier scale, said membersbeing yof suf- `ficient length tobring .at least two pairs of the meansfor support in alignment in yall positions of normal working adjustmentbe-v tween the members, and supporting members adapted to be applied tothe pairs of aligned means for support. y

8. The combination with a shore comprising membersy eXpansible in givenincrements after the manner of a Vernier scale as described, of anexpansible element cooperating therewith consisting of a turnableprismatic member, the supporting faces of which are dierently spaced,and the spa'cing increments of which are' smaller than said firstmentioned incrementsy whereby more close adjustment of the shore can beobtained.

In testimony whereof ysigned mylname.

l wiLLIAM LEE CHURCH.

I have hereunto

